condition	mean	min	max
4 h after light	16841.1	16841.1	16841.1
8 h after light	19900.6	16411.1	23390.1
12 h after light	19865.1	19675.5	20054.7
4 h after dark	12121.45	6853.5	17389.4
8 h after dark	7881.05	7261.9	8500.2
12 h after dark	6034.25	4447.6	7620.9